I tried to like this. I really do. I recognize a lot of effort went into creating this series. Especially for a hobby project. The art is great and characters are cute. The story and premise however doesn't just feel like it took inspiration fom
girls last tour, it actually looks like an exact carbon copy of it. Last chapter with the guy that lost his journal, this chapter making the music. Both scenarios were mostly identical in girls last tour.
Even the title of the manga sounds similar.
All of this give off a lingering feeling of recent isekais that copy the ideas of previous ones, never expanding on them. Overall I respect the hard work, it's just not my cup of tea.